Blow-torch.



A. R. GROSS.

BLOW YORCH. APPLICATION FILED MA? n. 1911. RENEWED DEC. 24. 1917.

Patented. July 30, 1918.

5111 uc n fez TE El ANGUS It. GROSS, OF BALTIMORE, MARYLAND.

BLOlV-TORCH.

Application filed March 17, 1917, Serial No. 155,576. Renewed December 24, 1917.

To all whom it may concern:

Be it known that I, ANGUS R. GRoss, a citizen of the United States, residing at Baltimore city, State of Maryland, have invented certain new and useful Improvements in Blow-Torches; and I herebydeclare that the following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form part of this specification.

This invention relates to blow torches which are used. in metal working for brazing and cutting metal by means of intense heat generated by the combustion 0:5 gases, such as acetylene and oxygen; the present invention has )articular reference to the construction of the head and nozzle of such torches and its objects are (1) to provide a blow torch having a novel removable interchangeable nozzle which requires only the manipulation of one part, the nozzle itself, to attach it to or detach it from the head; (2) to make the nozzle in such manner that back firing of the gases in the head or nozzle and injury of the head or nozzle thereby will be prevented; (3) to insure proper mixing of the gases within the nozzle, and to bring both the heating flame and the cutting jet readily and easily under the control of the operator; and (4) to make the working head. and nozzle small and compact so that the operator can 1 ore easily observe and correctly apply the flame while operating the torch.

The invention consists in the novel construction of the torch head and the onepiec emtwhle interchangeable nozzle, and he com mying drawings illustrate a rac al embodiment thereof, and I will explain the invention in connection with said drawings to enable others skilled in the art to manufacture and use the invention.

In said drawings:

F'gure 1 is a longitw'linal vertical sectional View through the. nozzle and head of the torch adjusted in operative position.

Fig. 2 is a view of the nozzle detached. Fig. 3 is an end View of the head and nozzle.

Fig. 4. is a top plan view of Fig. 3; and

Fig. 5 is a bottom plan view of the nozzle tip.

In the drawings 1 desig gnates the head of the torch which is preferably formed of a single casting, which head is cylindric and preferably has its lower end tapered externally as at 1; and it has a laterally extend- Specificatlon of Letters Patent.

Patented July 30, 1918.

Serial No. 208,700.

ing shank l" by which it may be connected to the gas supply pipes in the usual or other preferred manner.

In this shank 1 are three bores 1F, 1, 1 which may be internally thneadechfor engagement with pipes 2, 2. 2 which may form part of the torch body and connect the head with a suitable handle, not shown, in the usual manner. Any suitable gases may be used, for example the pipe 2 for high pres-dire oxygen, the pipe 2 for preheating o:-.ygr and the pipe 2 for acetylene.

Extt ling through the body 1 preferably at right angler: to the sockets 1, 1, 1 is a bore which is of small diameter at bottom and large diameter at top; and the upper end of this bore is internally threaded as at 3; below this threaded portion the bore is show as formed w'th a circular step 3 preferably slightly s ller in diameter than the part 3 and oppo. re the socket 1. Below the step 3 is a second smaller step 3 practically opposite the bore 1; and below the bore 1 is a third step 3 smaller than the step 3 and preferably opposite the bore 1.

Removably secured within the bore of the head is the upper end of a removable interchangeable nozzle, which preferably has a squared'or angular cap 4 on its upper end by which it can be turned, and below this cap is an externally threaded portion l enga ing the threaded portion 3. Below this threaded portion 4. are circular portions 4, 1, 4 respectively closely fitting within the steps 3, 3. 3 of the bore; and below portion +l the nozzle has a cylindric portion 4! which extends through the opening in the head and projects below the same forming the nozzle proper. In the part 4 is an annular groove 4 that communicates with the high pressure oxygen supply by means of a port 1 in the head. In the part ":k is an annular passage 4 that communicates with the preheating oxygen supply or port 1 by passage l in the head. In the part 4 is an annular channel at that communicates with the acetylene supply or socket 1 by a passage l in the head.

\Vithin the nozzle stem is a preferably axially disposed passage 4. which extends to the part l and communicates with the channel l" by a lateral passage 4'.

lhe nozzle is also provided, preferably exterior to the' passage 4:, with a plurality of passages 4, three being shown, which extend through the stem of the nozzle to the that the out flowing oxygen in the 1 ,s

part 4? and con'ununicato with the chann by means of transverse passages or bores -48 Y The passages i also communicate with the channel l by means of small i we or bores l see Fi 1.

It will be seen wltri this 2 ement the passages conmnuiicate ind/h the preheating oxygen supply and also with the acetylene supply. and. that the parts are such al passes the passages i and. create tion in the acetylene 55a passages ii and. rlraws the acetylene out with the any n. make the preheating flame, the relative amount oi? oxygen and acetylene employed depending upon the pressure and the relative size of the passages 49 and. l it is desired, to use the cutting flame o I is admitted from pipe 2 to th pan and produces the desired. intense outs. tlame.

The supply of the can be controlled by valves in the usual manner. ll ith this device it will be seen that there no eripair sion chamber in the nozzle in which the gases may expand and ignite or back lire; the rush of the gases though the passages l preventing any back tiring in. the assa ges and consequently the nozzle is not liable to burn out or the nozzle burn oi? as fre quently happens with the present known torches.

For different work different quantities of gases are required; and to avoid the use of a multiplicity of release it is customary to ing ) provide interchangeable nozzles; hereto-tore the nozzles have been attached to I in various ways that required the (liscon.

the head nectir f and reconjnoctn of several various parts in order to SlllJE-Ellltlllj: one nozzle for another. in my invention l. make the nozzles interchangeable and with proper passages according to the requirements oi the work; and when it is desired to substi tute one nozzle :tor another all that is necessary is to unscrew the nozzle by means of a wrencln or the lingers applied tothe cap l of the nozzle engaged with the head, lift out such nozzle and then insert a new nozzle and screw it home until it is firmly engaged with the hea It will be seen with my 111- vention there but one part to remove or replace the nozzle and its fastening being in one piece; the connection is made at the end of the head farthest removed from the liame; there are no exterior tt'astonings between the stem end of the nozzle and the head; and the head can be tapered on its under side so as to make a neat small con"- veniently operated cutting torch. The utility and eilieiriencf. oil 7"" inv ntion will be readily ap ireoiatetl l'ianiiliar witp' non in 1 n slow titling entirely through the bore of l and having a portion. fitting the i, a, and a stem projecting out of the head one end oi. the here, said stem having a longitudinal passage communicating with one o the said gas supply passages in "the head and also having a passage extending through the stem beside the first passage and communicating with the other gas passages, substantially as described.

in a blow torch, the combination of ahead having a bore extending therethrough and. provided with a threaded portion, and

phirality of gas supplying passages connec 'ith said bore; a removable nozzle extending entirely through the bore of the head'antl having" a portion fitting the bore of the head and provided with a threaded portion engaging the internally threaded portion. of the bore to fasten the nozzle therein; said nozzle also having a stem projecting out of the head at one end of the l. and a longitudinal. passage extending through the stem and communicating with pneof the gas supply passages, and also among other pa. ages extending through the stem beside the first passage and communicating with the other gas supply passages said nozzle being, removable and replaceable, substantially as described.

3. in a blow torch, the combination of a I head having ahore extending therethrough a a h rszer end and a shank provided with a plu- -z,.nty oi: passages for connection. with heatng' supplies; with a removable nozzle ill wovialmil with a threaded portion at its a 3; a portion adapted to fit the opening or the head and provided with a threaded portion engaging the threaded portion of said here to secure the nozzle therein; said nozzle also having a reduced stem portion extending through the smaller end of the bore and projecting out of and from the head, said stem having an axially disposed passage extending therethrough and. cominunicating with the uppermost gas channel, and said stem also having another passage extending therethrough communicating with both the other gas channels, substantially as described.

in a blow torch, the combination of a head having bore extending therethrough and g'n'oviced with a threaded portion at its larger end, and a shanlr provided with three passages for connection. with gas supplies connnnnicating with the bore; with a reinomhle nozzle having a portion adapted to fi in the op ning of the head and provided detl portion engaging the with said here; or removable nozthreaded portion of said opening to secure the nozzle therein, and also having annular channels respectively communicating with the adjacent gas supply passages, said nozzle also having a reduc d stem p :tion extending through the reduced end oi the bore and projecting from the head, sail stem having a bore extending thcrethrough coinmunicating with one annular channel and also having another bore or passage extending therethrough communicating with both the other annular channels, substantially as described.

A blow torch, comprising a body having an axially disposed bore having three annular steps between its upper and lower ends, said steps successively increasing in diameter, said body also having three passages respectively leading from said step and adapted to be respectively connected to gas supplies; with a removable interchangeable nozzle having a body portion fitted within the bore of the head and provided with three step-portions respectively engaging the step-portions of the. bore, each stepportion of the nozzle having an annular channel communicating with the adjacent gas passage in the head; said nozzle also having a reduced stem portion extending out of the body when the nozzle is engaged therewith, said stem having a passage extending to and comnuu'iicatmg with the annular channel in one step of the nozzle and having another passage extending to and communicating with the annular channel in another step of the nozzle, the latter passage also communicating with the channel in the third step of the nozzle, substantially as described.

6. A blow torch comprising a body having an axially disposed bore threaded internally at its upper end and having three annular steps between its upper and lower end, said steps increasing in diameter, said body also having three passages leading respectively from said. steps and adapted to be respec tively connected to a gas supply; with a removable interchangeable nozzle having a body portion fitted within the boreof the nozzle is engaged therewith; said stem l1av---- ing a passage extending to and communicating with the gas passage in one step, and having other passages extending to and communicating with the gas passage in another step, the latter passages also communicating with the channel in the third step, substantially as described.

7. A blow torch comprising a body having an axially disposed bore threaded internally at its upper end and having three annular steps between its upper and lower end, said steps increasing in diameter, said body also having three passages leading respectively tram said steps and adapted to be respectively connected to the high pressure 0);:- gen, and the pro-heating oxygen and acct) lene gas supplies; with a removable interchangeable nozzle having a body portion fitted within the bore of the head provided with an externally threaded portion to engage the threaded portion of the bore, and with three step portions respectively engaging the step portions of the bore, each step portion of the nozzle having an annular channel connnunicating with the adjacert gas passage in the head, and said n vzzle ha ving a reduced stem portion exte; ling out of the body when the no zzle is ngaged therewith; said stem having a passage extending to and communicating with the annular channel in one step of the nozzle, and having other passages extending to and communicating with the annular channel in another step of the nozzle, the latter passages also communicating with the channel in the third step of the nozzle, substantially as described.

In testimony that I claim the foregoing as my own, I afilx my signature.

- ANGUS R. GROSS. 

